Steel bar for pre-stressed concrete (PC steel bar for short) is pre-stressed concrete steel with very high technical content, which is developed by Japan Neturen Co., Ltd. in the 1960s. It features high strength toughness, low looseness, strong concrete bond stress, good weldability and upset forging and material saving. It is widely applied to high strength pre-stressed concrete centrifugal pipe pile, electric pole, overpass pier and other pre-stressed concrete components, and has very wide market in the world, in Southeast Asian regions in particular.

In pipe pile structure, end plate is steel part at both ends of pipe pile structure, which plays a role in fixing pre-stressed main reinforcement. The main effect of end plate in pipe pile structure is to play a fixing role for exerted pre-stressed main reinforcement. End plate is the main component in pipe pile production. The effect of end plate mainly includes two aspects: I. Pre-stressed main reinforcement plays a fixing role in overall stretching. II. It plays a welding connection role in connecting pipe piles.